Editing Renewable energy (section)

====Nuclear energy====
[[Breeder reactor]]s could, in principle, depending on the fuel cycle employed, extract almost all of the energy contained in [[uranium]] or [[thorium]], decreasing fuel requirements by a factor of 100 compared to widely used once-through [[light water reactors]], which extract less than 1% of the energy in the actinide metal (uranium or thorium) mined from the earth.<ref name="Argonne">{{cite web |title=Pyroprocessing Technologies: Recycling Used Nuclear Fuel For A Sustainable Energy Future |publisher=Argonne National Laboratory |url=https://www.anl.gov/sites/www/files/2023-09/Recycling%20Used%20Nuclear%20Fuel%20Brochure.pdf |url-status=live |archive-url=https://web.archive.org/web/20130219051536/http://www.ne.anl.gov/pdfs/12_Pyroprocessing_bro_5_12_v14%5B6%5D.pdf |archive-date=19 February 2013}}</ref> The high fuel-efficiency of breeder reactors could greatly reduce concerns about fuel supply, energy used in mining, and storage of [[radioactive waste]]. With [[seawater uranium extraction]] (currently too expensive to be economical), there is enough fuel for breeder reactors to satisfy the world's energy needs for 5 billion years at 1983's total energy consumption rate, thus making nuclear energy effectively a renewable energy.<ref name="sustainablenuclear">{{cite web |title=Breeder reactors: A renewable energy source |last=Cohen |first=Bernard L. |publisher=Argonne National Laboratory |url=http://www.sustainablenuclear.org/PADs/pad11983cohen.pdf |access-date=25 December 2012 |url-status=dead |archive-url=https://web.archive.org/web/20130114062518/http://sustainablenuclear.org/PADs/pad11983cohen.pdf |archive-date=14 January 2013}}</ref><ref>Weinberg, A. M., and R. P. Hammond (1970). "Limits to the use of energy," ''Am. Sci.'' 58, 412.</ref> In addition to seawater the average crustal granite rocks contain significant quantities of uranium and thorium with which breeder reactors can supply abundant energy for the remaining lifespan of the sun on the main sequence of stellar evolution.<ref>{{cite web |title=There's Atomic Energy in Granite |date=8 February 2013 |url=https://www.nuenergy.org/theres-atomic-energy-in-granite/}}</ref>